Clean solar panels absolutely provided higher productivity. We recommend solar panel cleaning be done once every 1-3 years depending on location.
The photo showcases a before and after of a recent residential solar panel cleaning done in Santa Rosa, CA.
The graph highlights just how important clean panels are to system productivity.
This rooftop system had not been cleaned in over 5 years. The solar cleaning was completed the morning of July 25th, 2025 and output immediately increased from 8-10 kWh to 16-18 kWH.
This is a significant ongoing production loss that can be avoid with a routine solar cleaning.
